Figure 7.

MdAREB2 promotes the accumulation of Suc and soluble sugars by MdSUT2. A, qRT-PCR analyses of MdAREB2 and MdSUT2 transcripts in transgenic plants. A virus-induced gene silencing method was performed using the in vitro leaves of three MdAREB2 transgenic apple lines. The MdSUT2-TRV vector was used for MdSUT2 gene suppression, and it was transiently transformed into the transgenic lines MdAREB2-1, MdAREB2-2, and MdAREB2-4. The TRV empty vector was used as a control. B and C, Soluble sugar (B) and Suc (C) contents as treated in plants in A. n.s. indicates nonsignificant differences (P > 0.01); asterisks indicate statistically significant differences (*, P < 0.01). The values are means ± sd (n = 3 independent experiments).